Gas-engine.



G. E. MOELRO Y.

GAS ENGINE.

APPLICATION FILED FBB.15, 1912. ggg, Patented June 3, 1913.

5 SHEETS-SHEET 1.

G. E. MGELROY.

l GAS ENGINE. APPLICATION FILED FEB. l5, 1912.

Lfe Patented June 3, 1913.

@SHEETS-SHEET 2.

G. E. MGELROY.

GAS ENGINE.

l PPLIUATION FILED PEB. 15,1912 o 1,63,38 Patented June i 1913.

5 SHEETS-SHEET 3.

30 29 Ifo fm 2,5 F" l 'IZ ik 23 full'ln. l I a *I* D I 241 J/- T* H qa 2?/ p l'i i" G. E. MGELROY.

GAS ENGINE.

APPLICATION FILED 1113.15, 1912.

'Ls Patented June 3, 1913.

5 SHEETS-SHEET 4.

G. E. MGELROY.

GAS ENGINE. f APPLICATION FILED F1111I 15, 1912.

Patented June 3, 1913 mmm i recense.

' high eticiency-may be attained.

`a simple ymechansinby which theoseillaf Wirren; camarasarmar ortica.

GEORGE E. MeELnoifr, 0E NEWARK,-NEW'JERsEirQnssre-Non ToiyreELRoY ENGINE` COMPANY, 0E NEWARK, NEW JEnsEY; a c oEroEATIon or NEW JERSEY.-

ea'ssaaaa To all whom it may concern: y

Be it known that-LGEORGE' E. -MoELRoY, a citizen of the United States, of the city of" Newark, county of Essex, and State of New Jersey, have invented a new and useful ImAv provement in Gas-Engines, of which thev following is a full, clear,'and exact description.v y

My invention relates to improvements in gas or explosive engines, and the general object of my invention is to improve the' construction of such engines to the end that great simplicity, durability, cheapnesS, and

Another object of myinvention is to produce an engine in whichthe "cylinder and valve seat may both be easily and accurately bored without the necessity of any .milling or special operation, andY in which the valve is arranged so that it has a very easy move? .ment in the Wall of the cylinder, and isheld to its seat by the internal pressure so that it cannot leak.-

'Other objects of my invention are to prou duce an engine in which the parts are perectly timed, and if out of time can be easily adjusted, in which the internal parts are easily accessible, and especially to produce an engine having a reliable and easy' valve stroke and with the valve arranged in such a way that the intake and exhaust portsV are both open during practically the whole stroke of the piston, so that ant'adequate charge is readily admitted to the cylinder, and the dead gases are expelled orvexhausted. In this way I relieve the piston of back pressure, and provide for a fresh charge of high efficiency.v f

A further object of my invention is to revduce the mechanism to few parts, and to'arrange these so that there is very little friction. T My invention isfalso intended toprovide SpecicatiionofLetters Pate-nt. I

. k'sui table Patented June 3, ita

Y s application ined retra'iary 1`5v19-12.` serial ne. 677,851.

' accident to any part of one cylinder or con` tained mechanism, the others can continue to operate.` It. will beI further understoody from the description which follows, that. the

simplicity and arrangement of parts enable my engine to be built of light material and to be of light weight in comparisonto the power which it yields. f

Reference is'to be had tothe accompany ing drawings forming a part of this speci-` fication,in which similar reference characters indicate corresponding parts 1n all the views.

Figure l 1s a detail vertical axial section of the engine embodying my inv'ention.' 70` FigLQL-is a side elevation'with parts in section, and with bothin-take and exhaust ports closed and with the piston at the lower part of its stroke. Fig. 3 is a view similar to Fig, 2 but with the piston near 75 the'upper part of its stroke and with the valve rod retaining mechanismin section. Fig. 4 isa view similar to Figs. 2 and 3 but.r with the valve in position to open the' exhaust port. Fig. 5 is a broken sideeleva- 80= tion ofthe engine at right angles to vthe view shown in Fig. 4. Fig. `6 is 'a detail section through the piston and longitudinally of the wrist pin. Fig. 7 is a vertical cross section of the engine. Fig. 8 1s a planview e5 with the cylinder head removed. Fig. 9 is' a vertical section through a portion of the piston and showing the spur wheel for seating the valveactuating pins, and Fig. l0 is .a vertical section through the piston and @0- showing in detail the pawl mechanism` for actuating the wrist pin and spur wheel.

`The engine is provided with a plain cylinder l'which can be readily bored out- `from end to end, and which has the custom.-

.ary water jacket ll and removable head l2,

the headhavingva suitable Aopening 13 oiihg sparkgplugand,'the 'whole resting on afk se 14k" which forms {thefcranlccase :shaft: 15 this being'proglo@ S. work the valve by means of'a simple' in'edcha-l` `.-vided' ntlilthe nism in thclpiston, and further, my ,linvngy,lviouslyfthefbas, lllcan' ybe offany approvedl'f` tion comprises an"eng`iriein which eaclifcyl-f.` ,d esigri.. v The shaft l ,5, ris fp1ovifded withthe`f`` inder` is complete linfitse'lfv andjof vsuchwa ,v .usual or, preferredrfformf of crankv 1,7 y character-that',where multiple cylinder en lich'sjconiiectedby "'afrod orpitman 1`3y`f-.11 05= -gines are used,'the cylinders can be added" s f with .the ,wristpin 19 which is journaldwin. desired. It willbe` seen byhavingmyc il# ,the `,p iston L O,' 'he flatter recipro'zating'y as@ inders and contained .'.inechanisml ofi-t rsufal :in'fft'he eylindiyld'.' ff character, and will-be' understood from the description whichfollws, that in case of fThe, cylinder l0 is' pro'vided` near the top l: `withintake and exhaust ports 22 andQB 116' which one Wall of the cylinder 10, and which forms the seat for the valve 29 hereinafter re ferred to. Obviously any suitable connections can be made with the ports 22 and .23,but I haveshown a convenient means vided with openings 26 and 27, theformer being suitable for connection with a pipe 28 leading from the carbureter or other source ,ofy supply, and the opening 27 serving for the exhaust. l y

The valve 29 and its' operating mechanism is an important feature of the invention, and it will be noticed from the description which follows that this valveis extremely simple, and is operated in such a way that there is no liability of its sticking or leaking. IFurthenit can be very cheaply and easily made. By reference to Fig. 8 it will be seenthat the valve seat 21 can be bored out longitudinallyI of the cylinder, no milling work being necessary, 'and likewise the valve 29 can be a section of a cylindrical rod, the rod being simply cut so that the valve will conform to the shape of the valve seat 21 with its inner surface correspond.

ving to the surface of the cylinder wall. It will also be noticed by reference to Fig. 8, that the valve seat and valve when viewed vin plan, form'a little more than half of a circle, so that the valve isalways retained in place and it is open to the ypressure from within the cylinder so that it is always pressed snugly to its seat, and yet it will be observed that it can be kept easily'lubricated. The valve when arranged as described, also has the advantage of being very easy to move, as it has no springs, and comparatively no back-pressure to work against, and it is operated directly by the piston as hereinafter described..

AThe valve 29 is carried by the two vertically arranged rods 30 which extend longitudinally through the lwall of the cylinder 10, ,projecting from the lower end'thereof as shown, and adaptedto extend at the upper end into the sockets 31 in the cylinder head. 4Theserods aremovable in ways 32. and 33 in the cylinder wall, and while one rod may be used, it is better to have two, as the valve is thereby` better balanced, and has a smoother, freer movement. The valve 29 and the rods 30 move so easily that it is desirable to have a retaining device t0 cause l them to hold the valve 29 in position to close both ports exce t at the right moment for the intake orjex aust, as will be presently described, and -any suitable device can be used. AI prefer the means illustrated in Fig. 3, where a ball 34 is arranged to engage lead into the space 21 which is ina corresponding socket in one or both of the rods 30, and the arrangement disclosed enables the circuit of the spark plug to be broken except when the rods are in the position shown in Fig. 3 with the vvalve 29 closed to both ports 22 and 23. To provide for this the ball 34 is pressed by a rod 35 which lmoves in the post 35a, the latter extending out from the cylinder 10, and the vrod or pin 35 operates against an insulating bushing 36, this being retained in a plug '37 of conducting material which is carried on the outer end ofy the post 35a. The plug 37' is pressed bythe spring 38 which connects with the binding post 39, this being iii-- sulated on the cylinder 10 and serving as the ground connection'for the spark plug. 'I have not shown the full circuit, neither have I shown the spaikplug, because the circuit and plug may be of any usual kind and I simply wisli to ,illustrate that the circuit is broken when the movement of the valve rod 30 pushes out the ball 34 and bushing 36, therebyA releasing the .spring 38 from contact with the part 37. Thus it will be .seen that an explosion can only occur when the valve 29 is in the correct position, as at other times the circuit is broken. The

mechanism justdcscribed therefore serves the double purpose of retaining the valve and rod in the` desired position, and of breaking the spark plug circuit.

To provide for actuating lthe valve 29, l

arms 40 and 41 are provided which are actuated by the piston, the arm 40 being secured to the valve top and extending into the path of the pin. 42 on the piston, and the arm 41 being located at 'the lower end of the valve rods 30 and in the path of the pin 4310i. the piston. These pins 42 and 43 are mounted to move vertically in the piston as shown best in Figr, and they are normally pressed inward by springs 44 which are held to press against collars 45 on the pins 42 and 43. The inner ends of the pins 42 and 43 -are preferably beveled as shown at 42n and 43 so as to make easy .contact with the ends of the teeth 46 on theA toothed wheel 47 which` is attached to the end of the wrist pin 19 by the bolt 48, but' which c an be secured to the wrist pin in any convenient way so that it will turn with it. The teeth 4G of the toothed wheel 47 are spaced apart the right distance to give to the pins 42 and 43 and consequently tothe valve, the desired movement and at the right time, as will presently appear. 'Ihe toothed wheel 47 and .the wrist pin 19 are turned by means of the ratchet -wheel -49l which is secured'to the wrist pin, and

which isaetuated by a. pawl 50 which is preferably in the form of rod, and it is pressed into engagement with the ratchetwheel by afspring 51 which. presses against a shoulder 52 on the pawl 50 and is-heldin place by the nut 53 as shown in Fig. 10. ln order that the wrist pin may not turn, and in order that the ratchet wheel 49 may be held rigid while the pawl 50 is traveling back over a tooth, a detent Wheel 5-1 having notches 55, is secured to the Wrist pin'and is engaged by a-detent 56 (see Figs. 6 and 7) -this detent being pressed by a spring 57 which is backed by'ra nut-58 as shown in Fig. -Gf Otf'course itfivill 'he understood lthat any other suitable detent'can be substitutedfor that shown.. i

Referring to the means' fonactuating the pins 42 and 43, it will be seen that at each stroke ot the piston' the connecting rod 18, by reason of its connection with the crank shaft, will oscillate,`and the oscillation will first bring the pavvlA tOffbaclr into engagement with a tooth of the ratchet Wheel 49, and the next .oscillation vof the connecting rod will. carry theratchet' Wheel forward a distance lof one tooth Aand will thereby turn the toothed Wheel 4:7 and actuate the pins 4t2 and V4:3. ltfvvill be noticed that the arrangement described besides actuating the pins l2 and 43, serves the ffurther purpose ot turning the wrist pin 19 step by step at cach oscillationpot -tlie connecting rod, so that the Wrist pin has all its parts subjected to an even Wear, which isa distinct advantage as'Iin many types' of engine the connect-ion is suchthat' thewrist pin soon Wears on oney side, or on opposite sides. It will be seen 'that ifseyeral cylinders are used, the only thing necessary'inorder to time the strokes and valve movements properly, is to adjustfthe ratchet wheels 49 and toothed wheels 47, and this can be done by simply moving a desired connecting rod forward and back as desired to bring the 'ratchet Wheel into the right relation with the ratchet 'Wheels on the other Wrist pins.

1With the 1valve and piston in the position shown in Fig. l, a charge can tloiv in by suction on the down stroke or the piston, at the end of which the part 43 `strikes the arm 4i and moves the valve to the position shown in Fig. 2. The up stroke of the piston then` compresses the charge and the piston will be in the position shown in Fig. 3, the valve remaining in position to close the ports as the teeth o t the Wheel i7 will not have engaged the pin ft2 during this stroke. The piston their descends, and the pin 453 is thrown out so as to strike the arm 4l and open the exhaust port 23. rThis port remains open during the up' stroke till the piston nears the cylinder head and that gives ample opportunity for the exhaust. The pin 42 Willsirolie the arm -l-O and move the valve to the position shown in Fig. l ready for another cycle.

From the foregoing description it 'will be seen that the engineis very simple in construction, ting it has few part-s, and that haust and intake' ports leading intojsaid.-

recess, a valve seated and sliding in ,the aforesaid recess so as to open and Vclose the intake and exhaustports, the innerjvall oit the valve being subject' to the cylinder pressure, a piston reciprocating in the cylinder,

and means for actuating the valve -by the movement of the piston. v

.2.. A gas engine comprising a ycylinder bavmg a segmental recess in its inner4 Wall, inlet and exhaust ports connected With-.the recess, a valveseated and sliding in the recess so as to open and close the said'ports,

a valve rod sliding inthe cylinder-wall and connected tothe said valve, arms project-ing inwardly from the rod near the upper and lower ends ot the cylinder, and means carried by the piston to engage the said arms' l i 'l i 90 and actuat/e the valve.. M 3. A gas engine comprising a hr'dng iii-take and exhaust ports,'a valve moving in a recessv in the inner Walletthe cylinder opposite the said` ports, "a5 valve rod extending longitudinally through the cylinder Wall and lconnected to the said valve, arms projecting inwardly from the upper and lower portions of theV rod, and pins or abutments on the piston toen'gagc the said varms and' actuate the valve. 4. A gas engine comprising a cylinder, a piston reciprocating in the cylinder, a valve sliding in a recess in the cylinder Wall and controlling the iii-take and exhaust ports to the cylinder, a valve rod extending longitudinally ot the cylinder and connected to the aforesaid valve, arms projecting from the rod near the upper and lower end therecylinder,

oli, means carried by the piston 'to strike the arms and operate the valve, and an automatic device in the piston to regulate 'the length ot the said arm striking means.

5. In a engine the combination with the cylinder having in-talte and exhaust ports, of the slide` valve controlling said ports, a piston sliding in the cylinder, means for actuating the valve by the piston strokes,

and a retaining device arranged to tempo-- rod and temporarily support the valve in osition to close the ports, said retaining c vice also serving to make and break the spark plug circuit.

7. In 'a gas engine the combination with the cylinder having in-take and exhaust ports, -a slide valve moving over the ports and in thecylinder Wall, a valve rod arranged parallel with the cylinder and cnnected with the valve, said rod having a' socket therein and a spring pressed detent engaging the socket, of striking arms secured to the rod and extending into the cyhnder, a plston sliding in the cylinder,

and means on the piston to engage the striklng arms.

8. Inal gas engine the combination with the cylinder, piston, and crank shaft, of the Wrist pin journaled in the piston, the connecting rod pivoted`to tbc r -nk shaft and journaled on the wrist pin, and a pawl and ratchet connection between the connectingrod and wrist pin by which the oscillation of the connecting rod turns the Wrist pin.

9. In a gas engine the combination With the cylinder, slide valve, striking arms for operating the valve, the piston sliding in the cylinder, the striking pins on the pist-on to lengage the striking arms, the crank shaft and connecting rod, of'means actuated by the oscillation of the connecting rod to'control the' position of the aforesaid striking pins.

l0. In a gas engine the combination with the cylinder,vvalve, and striking arms for actuating the valve, of the piston sliding vin the cylinder, the crank shaft and rod connecting With the piston, the' striking pins projecting from the piston to engage the striking arms and movable in and out with relation to said arms,V the toothed Wheel' having its teeth arranged to engage said striking pins, and means for actuating the toothed Wheel by the oscillation of the piston connecting rod.

11. In a gas engine the combination with the cylinder, valve, -and striking arms for actuating the valve, of the piston sliding in the cylinder, the crank shaftthe connecting rod, a Wrist pin in the piston, a paWl and ratchet connection between the Wrist pin and connecting rod, striking pins projecting from the piston to engage the said striking arms, and means actuated by the turning of the Wrist pin for forcing out the said striking pins. A A

. GEORGE E. MGELROY. Witnesses:

WARREN B. HUTCHINSON, THOMAS T. SEELYE.

Copies of this patent may be obtainedfor ve cents each, by addressngthe Commissioner of Patents, Washington, D. G. 

